Light enters through the cornea, bends through the crystalline lens, and converges on the retina — transforming photons into the experience of seeing. A miracle of biological optics happening 572 million times per second across humanity.
Your retina contains ~6 million cone cells tuned to red, green, and blue wavelengths. From just three inputs, your brain constructs millions of perceived colors.
Cornea, iris, lens, retina — each layer a masterwork of evolution.
120 million rod cells activate in darkness, sacrificing color for sensitivity 1000x greater than daylight vision.
Follow the dot with your eyes